Battery not charging. MagSafe will not power laptop. Only green light.

MacBook Pro early 2011 unibody A1278 A1322

I have purchased a new battery which was working once installed. This is the second battery I've had to purchase for the same laptop.

However, now this new battery will not charge & the MagSafe adapters LED never turns orange.

I was told that this laptop, WITH NO BATTERY INSTALLED should still turn on with a MagSafe charger. My laptop has NEVER BEEN ABLE TO DO THIS! Instead, with no battery installed, I am not able to turn on the laptop.

I've tried all the resets including SMC. The SMC reset worked a couple of times, I think before the battery was completely at 0%. Now, SMC has no effect on reactions.

Another odd thing is that with the MagSafe power adapter plugged in, and pressing the power button for 10 seconds, the fan will turn on, but nothing else... to stop the fan running, I have to press the power button for 10 seconds again.

Anyone have suggestions how I can get my MacBook running and turned on again?

I am pretty sure this MBP never got wet... But not 100% sure... At home, I have a magic pad, extended keyboard and monitor + a silicon cover over the keyboard. While traveling, it is in a waterproof Pelican case. I know what water damage can do and I'm quite anal about keeping it dry!

Update (09/06/2017)

OK so the MagSafe didn't fix things. If you can get the system to run lets see what CoconutBattery shows its a free app that will gove you the batteries and charging logic power info. Here's the download: CoconutBattery. Take a screenshot of the full main screen and paste it here for us to see.